hi...i'm also do the taekwondo wireless scoreboard for my final year project....before this some students has do this but the display output is using LED and 7 segment...but they have give this suggestion...can u help me with this suggestion...

a) Design the system with LCD to display scores from judges, time of match and name of
player.

b) Used different frequency of transmitter and receiver pair for each Judges to make one or
more judges can push the button simultaneously.

c) Design the system with far wireless interconnection distance to ensure the system can
operate well.

d) Introduce the system with high security system in order to avoid sabotage from outers
signal.

i'm grateful if u can help me...

 

This project is not wireless, but might give you some information about the displays - http://forum.allaboutcircuits.com/showthread.php?t=22295

It's a big thread.

 

Don't make it wireless between the judges, have a system of #1 locks in his score which enables #2 to vote etc